2067 	BPF_REG_0, BPF_REG_1, BPF_REG_2, BPF_REG_3, BPF_REG_4, BPF_REG_5
4314 				for (i = BPF_REG_1; i <= BPF_REG_5; i++) {  in backtrack_insn()
4343 			for (i = BPF_REG_1; i <= BPF_REG_5; i++)  in backtrack_insn()
4377 				for (i = BPF_REG_1; i <= BPF_REG_5; i++)  in backtrack_insn()
8225 	WARN_ON_ONCE(regno < BPF_REG_2 || regno > BPF_REG_5);  in check_kfunc_mem_size_reg()
10619 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in map_set_for_each_callback_args()
10632 	for (i = BPF_REG_1; i <= BPF_REG_5; i++)  in set_callee_state()
10678 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in set_loop_callback_state()
10709 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in set_timer_callback_state()
10737 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in set_find_vma_callback_state()
10759 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in set_user_ringbuf_callback_state()
10792 	__mark_reg_not_init(env, &callee->regs[BPF_REG_5]);  in set_rbtree_add_callback_state()
11108 	struct bpf_reg_state *data_len_reg = &regs[BPF_REG_5];  in check_bpf_snprintf_call()
21475 			node_offset_reg = BPF_REG_5;  in fixup_kfunc_call()
22021 				insn_buf[0] = BPF_MOV64_IMM(BPF_REG_5, (__force __s32)GFP_ATOMIC);  in do_misc_fixups()
22023 				insn_buf[0] = BPF_MOV64_IMM(BPF_REG_5, (__force __s32)GFP_KERNEL);  in do_misc_fixups()